Calculator



FIG. 1 is a front, right, bottom perspective view of a calculator;

FIG. 2 is a right side elevational view of the FIG. 1 embodiment;

FIG. 3 is a left side elevational view of the FIG. 1 embodiment;

FIG. 4 is a top elevational view of the FIG. 1 embodiment; and,

FIG. 5 is a bottom elevational view of the FIG. 1 embodiment.

The broken lines depict environmental subject matter only and form no part of the claimed design. 

The ornamental design for a calculator, as shown and described. 